ratioplot4.py File Reference

Detailed Description

Example that shows custom dashed lines on the lower plot, specified by a vector of floats.

By default, dashed lines are drawn at certain points. You can either disable them, or specify where you want them to appear. Inspired by the tutorial of Paul Gessinger.

 
import ROOT
 
ROOT.gStyle.SetOptStat(0)
 
c1 = ROOT.TCanvas("c1", "fit residual simple")
h1 = ROOT.TH1D("h1", "h1", 50, -5, 5)
h1.FillRandom("gaus", 2000)
h1.Fit("gaus")
h1.GetXaxis().SetTitle("x")
h1.GetYaxis().SetTitle("y")
 
rp1 = ROOT.TRatioPlot(h1)
 
lines = ROOT.std.vector('double')()
for i in range(-3,4):lines.push_back(i)
rp1.SetGridlines(lines)
 
rp1.Draw()
rp1.GetLowerRefGraph().SetMinimum(-4)
rp1.GetLowerRefGraph().SetMaximum(4)
 
c1.Update()

Author

Alberto Ferro

Definition in file ratioplot4.py.